Get a monitor and contributor to air quality data in your city.
Air Quality 
Air Monitors
Air Purifiers
For Business
News
Support
Air quality in Saint Louis
Air quality index (AQI) and PM2.5 air pollution in Saint Louis
14.4K people follow this city
Saint Louis Air Quality Map
Real-time Saint Louis air pollution map
AIR QUALITY DATA CONTRIBUTORS
3 Contributors
See all
Pollen
What is the pollen count in Saint Louis today?
 | Index | Low | |
 | Tree pollen | Low | |
 | Grass pollen | Low | |
 | Weed pollen | None |
Source: tomorrow.io
Weather
What is the current weather in Saint Louis?
| Weather | Few clouds |
| Temperature | 60.8°F |
| Humidity | 92% |
| Wind | 1 mp/h |
| Pressure | 30.1 Hg |
live aqi city ranking
Real-time USA city ranking
| # | city | US AQI |
|---|---|---|
| 1 |  Georgetown, Texas | 130 |
| 2 | Boerne, Texas | 125 |
| 3 | Leander, Texas | 125 |
| 4 | Round Rock, Texas | 120 |
| 5 | San Antonio, Texas | 119 |
| 6 | New Braunfels, Texas | 115 |
| 7 | Cedar Park, Texas | 112 |
| 8 | Austin, Texas | 106 |
| 9 | La Habra, California | 94 |
| 10 | Fort Worth, Texas | 89 |
(local time)
SEE WORLD AQI RANKING
3D animated air pollution map
live Saint Louis aqi ranking
Real-time Saint Louis air quality ranking
| # | station | US AQI |
|---|---|---|
| 1 | Ladue | 52 |
| 2 | Forest Park | 25 |
| 3 | BLAIR STREET | 21 |
| 4 | BROADWAY (South) | 18 |
| 5 | Windswept Drive | 17 |
| 6 | Branch Street | 9 |
| 7 | Muirfield Lane | 4 |
(local time)
SEE WORLD AQI RANKING
US AQI
21
live AQI index
Good
Overview
What is the current air quality in Saint Louis?
| Air pollution level | Air quality index | Main pollutant |
|---|---|---|
| Good | 21 US AQI | O3 |
| Pollutants | Concentration | |
|---|---|---|
| PM2.5 | 3.3µg/m³ | |
| PM10 | 10µg/m³ | |
| O3 | 52µg/m³ | |
| NO2 | 10.2µg/m³ | |
| SO2 | 1.1µg/m³ | |
| CO | 229µg/m³ | |
✓
PM2.5 concentration in Saint Louis air currently meets the WHO annual air quality guideline value
Health Recommendations
What is the current air quality in Saint Louis?
 | Enjoy outdoor activities |
 | Open your windows to bring clean, fresh air indoors GET A MONITOR |
Forecast
Saint Louis air quality index (AQI) forecast
| Day | Pollution level | Weather | Temperature | Wind |
|---|---|---|---|---|
| Saturday, May 25 | Good 32 AQI US |  | 78.8° 64.4° |  20.1 mp/h |
| Sunday, May 26 | Good 31 AQI US |  | 77° 60.8° | 11.2 mp/h |
| Monday, May 27 | Good 27 AQI US | | 75.2° 60.8° | 15.7 mp/h |
| Today | Good 21 AQI US | 20% | 75.2° 60.8° | 15.7 mp/h |
| Wednesday, May 29 | Good 24 AQI US | | 73.4° 55.4° | 6.7 mp/h |
| Thursday, May 30 | Good 21 AQI US | | 73.4° 53.6° | 6.7 mp/h |
| Friday, May 31 | Good 35 AQI US | 100% | 71.6° 55.4° | 15.7 mp/h |
| Saturday, Jun 1 | Moderate 55 AQI US  | 100% | 78.8° 62.6° | 11.2 mp/h |
| Sunday, Jun 2 | Moderate 61 AQI US | 100% | 82.4° 62.6° | 11.2 mp/h |
| Monday, Jun 3 | Moderate 72 AQI US | 90% | 80.6° 64.4° | 8.9 mp/h |
Interested in hourly forecast? Get the app
News
The latest air quality news and resources.
How to best protect from air pollution?
Saint Louis air quality data attribution
3Contributors
- Missouri Department of Natural Resources
5 stations
Government Contributor
- 2 Anonymous contributors
2 stations
2 Anonymous Contributors
Data validated and calibrated by IQAirWhere is the cleanest air quality in Saint Louis?
AQI US, Metric